DL 349 then DL 1579 at Atlanta
Cleveland → Atlanta → Miami
Timetable, Atlanta time
09:58DL 349 from Cleveland at the gate
12:42DL 1579 to Miami leaves the gate
2 h 44 apart on the timetable
The last days
DL 349 and DL 1579 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.